{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "adverse event", "arguments": ["Combination.Drug", "Treatment.Drug", "Treatment.Time_elapsed", "Effect", "Treatment.Freq", "Treatment.Route", "Subject.Population", "Treatment.Disorder", "Subject.Gender", "Treatment", "Treatment.Dosage", "Subject", "Subject.Age", "Treatment.Duration"]}], "input": "Aggressive hydration, urinary alkalinization, and leucovorin were continued during the period of elevated methotrexate levels, with the patient receiving a course of hemodialysis and a dose of carboxypeptidase G2."}
{"adverse event": []}